I want to change my payment card

Hi, your question does not explain in enough detail what you want to do. Here’s a link to an article on how to write an effective question,

https://discussions.apple.com/docs/DOC-5931

I’m guessing you want to change a card in Apple Pay, here is an Apple Support article about Apple Pay,

https://support.apple.com/en-us/HT207875

If I guessed wrong, I’m sorry. Please post back with additional information on what you want to do and I’ll try and help..